These fan decorations fit over your 120mm (roughly 4 3/4") pc fans. They are made out of 3D printed PLA material.
I upload videos and builds weekly on my Youtube page and on Thingiverse. If you would like to learn how to build 3D printed items like this for yourself, subscribe to my Shinobi3Dp YouTube page! https://www.youtube.com/channel/UCrdiYua17IqEYn0i6PQ9DUg
Please note that putting anything in front of your pc fans may reduce it's cooling capabilities so use with caution. These fan covers are just for looks so if pc performance is your main concern, this product may not be for you. With that said, even though I use them on my computer, I'm not responsible for damages on your computer.